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B.Weed Control <br /> IWM is a process by which one selects and applies a combination of management techniques <br /> (biological,chemical, mechanical and cultural)that,together,will control a particular weed species or <br /> infestation efficiently and effectively,with minimal adverse impacts to non-target organisms. IWM <br /> seeks to combine two or more control actions which will interact to provide better control than any one <br /> of the actions might provide. IWM does not necessarily require the eradication of a weed species or a <br /> particular infestation of weeds,although these might be objectives in some cases. IWM is species- <br /> specific,tailored to exploit the weaknesses of a particular weed species,site specific and designed to be <br /> practical and safe. <br /> Moffat County's integrated treatment methods combine herbicide application and mechanical <br /> control. During reclamation activities such as slope building and grading, mechanical control will be <br /> implement as described below and in the fact sheets provided in Appendix B. Herbicide will be applied <br /> as needed during vegetation establishment <br /> CO DOA List B Noxious Weed Mechanical Control Recommendations <br /> Bull thistle and scotch thistle can be mechanically controlled by hoeing,tilling and digging that <br /> severs roots below the soil surface. Fire favors the thistle and is not recommended as a control <br /> technique. Flower heads and buds must be collected and destroyed. <br /> Canada thistle has an extensive root system that hand-pulling and tilling stimulates new plant <br /> growth. Mowing followed by herbicide application is effective if done every 10 to 21 days during <br /> growing season. <br /> Houndstongue can be mechanically controlled by cutting or pulling plants to remove the entire <br /> root crown. Plants may be mowed or cut during flowering season prior to seed nutlets development. <br /> Musk thistle can be mechanically controlled by tilling, hoeing and digging when infestations are <br /> less than 0.5 acres. Roots must be severed below the soil surface during the first year and in the second <br /> year before flower production. Flower heads and buds must be collected and destroyed. <br /> Plumeless thistle can be successfully controlled with any mechanical method that severs the <br /> root below the soil surface. Mowing is most effective when plants are at full bloom. Flowering cut <br /> plants must be disposed of properly because seeds can mature and become viable after the plant is cut <br /> down. <br /> Russian knapweed can be controlled by combining mowing with fall herbicide application. <br /> While mowing will stress the plant, it will not eliminate the infestation and may stimulate shoot <br /> sprouting. <br /> CO DOA List C Noxious Weed Mechanical Control Recommendations <br /> Cheatgrass or Downyborme can be mechanically controlled by fire,tillage, mowing and grazing. <br /> Effective control requires prevention of seed production. <br /> Page 4 of 5 <br />